3-in-1 multi-function input: This power amplifier board integrates AUX, Bluetooth and USB input methods, allowing you to connect a of audio sources as you like. What's more convenient is that you can easily switch between input modes and through the dial button, and enjoy the fun of music to the fullest. Powerful sound field experience: integrated TDA7498E power amplifier chip, supports 2.1 channel configuration, including left channel, right channel and subwoofer output. The left and right channels provide an output power of 160W each, and the subwoofer reaches a maximum output of 220W, creating an immersive audio experience . Wide power supply adaptation range: The power amplifier board is suitable for DC15~36V power supply, and also has undervoltage protection function when it is lower than 9V, and supports 12V power supply option. This means that you can choose a suitable power supply according to your actual needs without worrying about power supply issues. Compatible with a of speakers: the board is suitable for 30-200W, 4-8 speakers, so it can perfectly match with speakers of various specifications. Whether it is a small speaker or a audio equipment, it can be coordinated with the power amplifier board. Perfect protection mechanism: Our power amplifier board has built-in comprehensive protection mechanism, including anti-reverse polarity, undervoltage, overheating, overcurrent and short circuit protection. These smart protection features keep your audio system and speakers safe, so you can enjoy your music with confidence. size: 145 x 126 x 28mm Material: Metal colour: black Package Contents: 1 x Amplifier Board Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.